I am really surprised that this is still available, it has been up all day.
I don't think that this is a bad price at all for an M-122 anyway, and with all the broken F-122 cases out there, somebody needs it.
If I were a bit more flush right now, I would buy it myself.
This is an upgrade to the original F-122 case shell, in my opinion, because it has the superior (tougher and less brittle) Model M plastic material.
But, of course, "purists" will want it all-original.